Preheat oven at 350ºF (or 180ºC)Beat the egg whites lightly and add the sifted flour with baking powder, oatmeal, butter, milk and sugar. Perfume the preparation with the essence of vanilla. Mix integrating everything very well until achieving a homogeneous preparation.Place the preparation in a previously greased and floured rectangular.Place in preheated oven to cook for about 20 minutes.Let cool and cut into rectangles of the desired size. Reservation.Remember that if you want to make bars instead of cake, just use less flour.For the Frosting:Put the chocolate the white chocolate chips in a bowl and melt in the microwave for 30 seconds. Immediately cover the entire surface of the cake with the melted chocolate.Sprinkle with the almonds and let it cool off before cutting.